host.cc

本人收集整理的一份c/c++跨平台网络库

#include <string>
#include <iostream>
#include <cassert>
#include <errno.h>

#ifdef POSIX
extern "C" {
#include <sys/utsname.h>
}
#endif // POSIX

#include "host.h"
#include "logging.h"
#include "network.h"
#include "socket.h"

#if defined(_MSC_VER) && _MSC_VER < 1300
namespace std {
  using ::strerror;
  using ::exit;
}
#endif

namespace utils_base {

namespace {

void FatalError(const std::string& name, int err) {
  PLOG(LERROR, err) << name;
  std::exit(1);
}

}

#ifdef POSIX
std::string GetHostName() {
  struct utsname nm;
  if (uname(&nm) < 0)
    FatalError("uname", errno);
  return std::string(nm.nodename);
}
#endif

#ifdef WIN32
std::string GetHostName() {
  // TODO: fix this
  return "cricket";
}
#endif

// Records information about the local host.
Host* gLocalHost = 0;

const Host& LocalHost() {
  if (!gLocalHost) {
    std::vector<Network*>* networks = new std::vector<Network*>;
    NetworkManager::CreateNetworks(*networks);
#ifdef WIN32
    // This is sort of problematic... one part of the code (the unittests) wants
    // 127.0.0.1 to be present and another part (port allocators) don't.  Right
    // now, they use different APIs, so we can have different behavior.  But
    // there is something wrong with this.
    networks->push_back(new Network("localhost",
                                    SocketAddress::StringToIP("127.0.0.1")));
#endif
    gLocalHost = new Host(GetHostName(), networks);
    assert(gLocalHost->networks().size() > 0);
  }

  return *gLocalHost;
}

} // namespace utils_base